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ANSWER:

FESO4 colour is BLUE and NACL colour is black

1) PURE sulphuric acid is colourless or "water white". However, the presence of small amounts of ORGANIC material, will discolour the acid.

2) ZnSO4 Zinc sulphate is white in colour in the POWDER form. it does not impart colour.

3)Iron is silvery-grey in colour

4) Ferric oxide has the FORMULA Fe2O3. It is the red-brown colour of rust that you probably already know.

5) Fe304 can usually vary in color between OCHER, red-orange to dark red.

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Answer:

1.Bright yellow

2.white

3.bluish white

4.____

5.colourless

ANSWER:

a) two or more than two substances

b) solution

Explanation:

A BINARY solution is a homogeneous mixture of two or more than two substances in a solution.

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ANSWER:

Chromium triethylenediamine | C6H24CrN6+3 - PubChem.

Synonyms: Chromium triethylenediamine15276-13-8(Cr(en)3)Cl3Tris(ethylenediam...

Molecular FORMULA: C6H24CrN6+3

PubChem CID: 3082087

Molecular Weight: 232.29 g/mol...

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ANSWER:

In MEASUREMENT of a set, accuracy is CLOSENESS of the measurements to a specific value, while precision is the closeness of the measurements to each other

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ANSWER:

CALCULATE (5.7×10raise to POWER6)×(4.2×10raise to POWER5) and4.56×10raise to power3+2.62×10raise to POWER2

Answer:

Abnormal colligative property: When the experimentally MEASURED colligative property of a solution is different from that calculated THEORETICALLY by the van't HOFF equation or by the LAWS of OSMOSIS, then the solution is said to have abnormal colligative property.

Explanation:

ANSWER:

For atoms , valency is the number of ELECTRONS gained , lost or shared by an atom to complete its octet ( BASICALLY, to ACHIEVE its noble gas configuration). If the number of electrons in the outermost SHELL is less than 4 , then the valency is the same as the number of electrons in the outermost shell.

Explanation:

REASON. One MOLECULE of ammonia is composed of one nitrogen (N) atom and three hydrogen (H) atoms. By definition it is a COMPOUND because it contains more than 1 atom held together by chemical BONDS.

Answer:

which CLASS are you STUDYING and which SCHOOL are you and where is your school did your school STARTED ONLINE class

Answer:

An engine or motor is a machine designed to convert one FORM of energy into MECHANICAL energy. ... Electric motors convert ELECTRICAL energy into mechanical motion, pneumatic motors use compressed AIR, and CLOCKWORK motors in wind-up toys use elastic energy.

Explanation:

Answer:

How does engine size AFFECT performance? As a larger engine is usually ABLE to burn more fuel and produce more POWER than a SMALLER one, a car with a larger, more powerful engine is likely to be able to ACCELERATE faster and tow heavier loads than a car with a smaller engine can manage.

Answer:

A chemical formula is a way of presenting information about the chemical proportions of atoms that CONSTITUTE a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, COMMAS and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. ALTHOUGH a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulae can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than are chemical names and structural formulae.

Al2(SO4)3

Aluminium sulfate has the chemical formula Al2(SO4)3. The FORM of aluminium sulfate hexadecahydrate is Al2(SO4)3·16H2O.

Structural formula for butane. Examples of other chemical formulae for butane are the empirical formula C2H5, the molecular formula C4H10 and the condensed (or semi-structural) formula CH3CH2CH2CH3.

The simplest types of chemical formulae are called empirical formulas, which use letters and numbers indicating the numerical proportions of atoms of each type. Molecular formulae indicate the simple numbers of each type of atom in a molecule, with no information on structure. For example, the empirical formula for glucose is CH2O (twice as many hydrogen atoms as carbon and oxygen), while its molecular formula is C6H12O6 (12 hydrogen atoms, six carbon and oxygen atoms).

Explanation:

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ANSWER:

the PART of a VEHICLE that produces power to MAKE the vehicle MOVE

Dude, physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as the COMBINATION of a numerical value and a unit.

The two types of physical quantities are: DERIVED and fundamental

Derived quantities are a combination of two or more fundamental quantities (Eg. Density, ETC)

fundamental quantities are quantities which are measured in base units, or fundamental physical units (Eg METERS, etc)

SI unit of density is: kg/m³

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In chemistry, the EMPIRICAL formula of a chemical COMPOUND is the simplest positive integer RATIO of atoms present in a compound. A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur DIOXIDE, S₂O₂.

Answer:

Molecular WEIGHT of MNO2 = 87 g

Molecular weight of Hcl = 4 * 36.5 = 146 g

According to chemical reaction

1 g of Mno2 reacts with 4g of Hcl togive = 146/87 * 1

Or

5 g of Mno2 reacts with 4g of Hcl to GIVE = 146/87 *5 = 8.4 g of Hcl

Hence, 8.4 g of HCl will react completely with 5.0 g of MANGANESE dioxide.

ANSWER:

करंट का चालन स्वतंत्र रूप से गतिमान इलेक्ट्रॉनों पर निर्भर करता है जो चार्ज को अपने साथ ले जाते हैं।

अधिक संख्या में मुक्त गतिमान इलेक्ट्रॉनों, अधिक वर्तमान का संचालन किया जाएगा

ग्रेफाइट और हीरा दोनों ही कार्बन के आबंटन हैं, लेकिन उनमें अंतर यह है कि ग्रेफाइट प्रत्येक कार्बन परमाणु के साथ तीन इलेक्ट्रॉनों को साझा करता है जबकि हीरा अन्य कार्बन परमाणुओं के साथ चार इलेक्ट्रॉनों को साझा करता है

जैसा कि हम जानते हैं, कि घाटी के गोले में कार्बन के चार इलेक्ट्रॉन हैं। इस तरह, ग्रेफाइट में प्रत्येक परमाणु से एक मुक्त इलेक्ट्रॉन होता है, जबकि हीरे में कोई मुक्त इलेक्ट्रॉन नहीं होता है।

यह ग्रेफाइट को बिजली का संचालन करने की अनुमति देता है।

हालांकि यह अभी भी कई अन्य तत्वों की तुलना में एक गरीब कंडक्टर है

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ANSWER:

EXPLANATION: SUBSTITUTION

Answer:

The structures of 3-hydroxybenzoic acid and 4-hydroxybenzoic acid have been determined by gas-phase ELECTRON DIFFRACTION USING results from quantum chemical calculations to inform the CHOICE of restraints applied to some of the structural parameters. The results from the study presented here demonstrate that resonance hybrids are not as helpful in rationalizing the structures of 2-, 3-, and 4-hydroxybenzoic acids as are models based upon electrostatic effects.

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Answer:

Explanation:

NO, NaNO3 and KNO3 cannot be separated using a separating FUNNEL.

- A separating funnel can only separate the compounds with different miscibilities.

- The compounds SODIUM Nitrate (NaNO3 ) and POTASSIUM Nitrate (KNO3)  do not have very different miscibilities, i.e., they are not immiscible.

- So they cannot be separated by the use of a separating funnel.

- ACTUALLY they are separated by using the process of distillation under reduced pressure.

Answer:

Amorphous silica is differ from QUARTZ by its isotropic in NATURE WHEREAS quartz is anisotropic in nature.It has LOW melting point whereas quartz has higher melting point.It is pseudo solid whereas quartz is TRUE solid.

♣ᴍᴀɢɴᴇsɪᴜᴍ ɪs ᴀʟsᴏ ғʟᴀᴍᴍᴀʙʟᴇ, ᴍᴀᴋɪɴɢ ɪᴛ ᴀ ᴄᴏᴍᴍᴏɴ ᴀɴᴅ ᴇғғᴇᴄᴛɪᴠᴇ ғɪʀᴇ sᴛᴀʀᴛᴇʀ. ᴍᴀɴʏ ᴍɪɴᴇʀᴀʟs, ɪɴᴄʟᴜᴅɪɴɢ ᴅᴏʟᴏᴍɪᴛᴇ, ᴍᴀɢɴᴇsɪᴛᴇ, ᴀɴᴅ ʙʀᴜᴄɪᴛᴇ ᴄᴏɴᴛᴀɪɴ ᴍᴀɢɴᴇsɪᴜᴍ. ᴡʜᴇɴ ᴛʜᴇsᴇ ᴍɪɴᴇʀᴀʟs (ᴏʀ ᴀs ᴡᴇ ᴄᴀʟʟ ᴛʜᴇᴍ ᴡʜᴇɴ ᴛʜᴇʏ ᴀʀᴇ ғᴀɪʀʟʏ ʟᴀʀɢᴇ, ʀᴏᴄᴋs) ᴀʀᴇ ᴘʀᴇsᴇɴᴛ ɪɴ ᴡᴀᴛᴇʀ, ᴛʜᴇɴ ᴡᴀᴛᴇʀ ᴀᴄᴛs ᴀs ᴀ sᴏʟᴠᴇɴᴛ ᴀɴᴅ ᴘɪᴄᴋs ᴜᴘ ᴍɢ sᴏʟᴜᴛᴇs.

♣ᴛʜᴇ ʜᴇᴀʟᴛʜʏ ᴡᴀᴛᴇʀ ᴀssᴏᴄɪᴀᴛɪᴏɴ ɪs ᴘᴜsʜɪɴɢ ғᴏʀ ᴀ ᴍɪɴɪᴍᴜᴍ sᴛᴀɴᴅᴀʀᴅ ᴏғ ᴀᴛ ʟᴇᴀsᴛ 25 ᴍɪʟʟɪɢʀᴀᴍs ᴏғ ᴍᴀɢɴᴇsɪᴜᴍ ᴘᴇʀ ʟɪᴛᴇʀ ᴏғ ᴡᴀᴛᴇʀ. ɪғ ɴᴇᴡ ᴍᴀɢɴᴇsɪᴜᴍ ʟᴇᴠᴇʟs ᴡᴇʀᴇ ᴛᴏ ʙᴇ ᴀᴅᴏᴘᴛᴇᴅ ʙʏ ᴛʜᴇ ғᴏᴏᴅ & ᴅʀᴜɢ ᴀᴅᴍɪɴɪsᴛʀᴀᴛɪᴏɴ, ᴍᴏsᴛ sᴏᴜʀᴄᴇs ᴏғ ᴛᴀᴘ ᴡᴀᴛᴇʀ ᴀɴᴅ 700 ʙʀᴀɴᴅs ᴏғ ʙᴏᴛᴛʟᴇᴅ ᴡᴀᴛᴇʀ ɪɴ ᴛʜᴇ ᴜs ᴡᴏᴜʟᴅ ɴᴏᴛ ᴍᴇᴇᴛ ᴛʜɪs ɴᴇᴡ sᴛᴀɴᴅᴀʀᴅ.

Additional INFORMATION:-

• ᴍᴀɢɴᴇsɪᴜᴍ ʙᴜʀɴs ɪɴ sᴛᴇᴀᴍ ᴛᴏ ᴘʀᴏᴅᴜᴄᴇ ᴡʜɪᴛᴇ ᴍᴀɢɴᴇsɪᴜᴍ ᴏxɪᴅᴇ ᴀɴᴅ ʜʏᴅʀᴏɢᴇɴ ɢᴀs. ᴠᴇʀʏ ᴄʟᴇᴀɴ ᴍᴀɢɴᴇsɪᴜᴍ ʀɪʙʙᴏɴ ʜᴀs ᴀ ᴠᴇʀʏ sʟɪɢʜᴛ ʀᴇᴀᴄᴛɪᴏɴ ᴡɪᴛʜ ᴄᴏʟᴅ ᴡᴀᴛᴇʀ. ʜᴏᴡᴇᴠᴇʀ, ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ sᴏᴏɴ sᴛᴏᴘs ʙᴇᴄᴀᴜsᴇ ᴛʜᴇ ᴍᴀɢɴᴇsɪᴜᴍ ʜʏᴅʀᴏxɪᴅᴇ ғᴏʀᴍᴇᴅ ɪs ᴀʟᴍᴏsᴛ ɪɴsᴏʟᴜʙʟᴇ ɪɴ ᴡᴀᴛᴇʀ ᴀɴᴅ ғᴏʀᴍs ᴀ ʙᴀʀʀɪᴇʀ ᴏɴ ᴛʜᴇ ᴍᴀɢɴᴇsɪᴜᴍ ᴘʀᴇᴠᴇɴᴛɪɴɢ ғᴜʀᴛʜᴇʀ ʀᴇᴀᴄᴛɪᴏɴ.

EXPLANATION:

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Answer:

common INDICATORS can not GIVE specific colour in specific solution.

so,they can not be USED to determine pH value.

they are used to determine whether the solution is acidic or basic?

EXPLANATION:

it is helpful for you or not?

ANSWER:

PLEASE MAKE your QUESTION SHORT

Answer:

OPTION (C) .

EXPLANATION:

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ANSWER:

where's the question

Explanation:

In the POEM 'CAT' by Eleanor Farjeon ,the question is -

which INSTRUCTIONS or orders in the poem are not directed to the cat?

Answer:

If the PRESSURE is INCREASED to 104 Pascal's at the same temperature, the VOLUME of the GAS

Answer:

Artificial silk or art silk is any syntheticfiber which resembles silk, but TYPICALLY costs less to produce. Frequently, "artificial silk" is just a synonym for rayon. When MADE out of bamboo VISCOSE it is ALSO sometimes calledbamboo silk.

Explanation:

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ANSWER:

it GIVES PLASTER of paris

Explanation:

ANSWER:

CONDUCTIVITY CRITICISM hxlhclclhcjlxhxoghc GIVEN

ANSWER:

Mg2+Cl2 GIVES RISE to 2MgCl

✵ RAYON is known as artificial silk as this FIBRE resembles silk in PROPERTIES.

✵It is OBTAINED by chemical treatment of wood pulp of COTTON

EXPLANATION:

आपके और आपके परिवार और दोस्तों और परिवार कल्याण के लिए समान रूप से इंडिया टुडे समूह हमारे देश के भविष्य में युवा लोगों को ऑनलाइन सीखने की पेशकश करने के लिए आपके और आपके समान है।

ANSWER:

NOOO it is not a PURE SUBSTANCE

ANSWER:

किसी भी द्रव का वह गुण जिसके कारण वह द्रव न्यूनतम पृष्ठ ग्रहण करने की प्रवृति रखता है द्रव के इस गुण को पृष्ठ तनाव कहते है।

सीजीएस पद्धति - डाईन/ सेमी

i.e., DYNE

cm

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Answer:

Explanation: Na2CO3 + 2HCl -------> 2NaCl + H20

Here hcl is LIMITING reagent.

By mass mass relation,  73g HCl GIVES 117g  NACL

                                    so 1g--------------->117/73g

                                    so 7.9g-------------> 117/73 *7.9 =12.66 gNaCl

So, ans is 12.66 g NaCl is produced.

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Answer:

Tyndall Effect: Tyndall effect is the SCATTERING of light as a light beam passes through a colloidal solution.

 Brownian MOTION: Brownian motion is the RANDOM MOVEMENT of particles in a fluid due to their collisions with other atoms or molecules.

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Answer:

Ionization, in CHEMISTRY and physics, any process by which electrically neutral atoms or molecules are CONVERTED to electrically charged atoms or molecules (ions). Ionization is one of the principal ways that RADIATION, such as charged PARTICLES and X rays, transfers its energy to matter.

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Explanation:

FINALLY, colloids can be CLASSIFIED based on the physical states:

Aerosol: LIQUID in GAS.

Solid Aerosol: solid in gas.

Foam: gas in liquid.

Emulsion: liquid in liquid.

Sol: solid in liquid.

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EXPLANATION:

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Answer:

BOHR frequency condition. [¦bȯr ¦frē·kwən·sē kən‚dish·ən] (atomic PHYSICS) The law that the frequency of the RADIATION emitted or ABSORBED during the transition of an atomic system between two STATIONARY states equals the difference in the energies of the states divided by Planck's constant.

Answer:

(a) Molar mass of O2 = 2 x 16 = 32 g

Number of moles in 12g O2 = Given mass/ Molar mass = 12/32 = 0.375 mole

(b) Molar mass of H2O = 2 x 1 + 16 = 18g

Number of moles in 20 g H2O = 20/18 = 1.11mole

(c) Molar mass of CO2 = 12 + 16 x 2 = 12 + 32 = 44g

Number of moles in 22g CO2 = 22/44 = 0.5mole

Explanation:

TETRAETHYL lead is USED as

A.Pain Killer

B.Fire Extinguisher

C.Mosquito Repellent

D.PETROL Additive

ĀNSWĒR

D. petrol addictive

Tetraethyl lead is used as ▶Petrol Additive

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Answer:

Based on the GIVEN equation it is clear that 1 MOLE of Fe2O3

i.e ferric oxide is reduced by 3 carbon monoxide.

Explanation:

1 mole of any COMPOUND occupies 22.4l of volume.

So, the volume of carbon monoxide required to reduce one mole of ferric oxide is =3×224.4dm

3

=67.2dm

3

.

Hence, OPTION C is CORRECT.

When 373k of heat is PROVIDED to the compound, it forms the compound known as calcium SULFATE hemihydrate. When it is heated, the WATER of crystallization present in the compound is lost, resulting in the formation of a new compound.

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